The first step a math tutor would suggest is to understand what it means when a number has an exponent. The “power” of a number indicates how many times the base would be multiplied by itself to reach the correct value.
The second step is to write the number in the base-exponent form, and lastly calculate what the final result would be. Consider the example of 2 to the power of 4: in exponent form that would be
So re-applying these steps to our particular problem, we first convert our word problem to a base-exponent form of:
To simplify this, all that is needed is to multiply it out:
91 x 91 x 91 x 91 x ... (for a total of 86 times) = 3003030475944692418432760633109602115250184264840353350917846360939527287986067341029861153493029958516806302593357837933895670840754887468051140953261479000263915823241
Therefore, 91 to the power of 86 is 3003030475944692418432760633109602115250184264840353350917846360939527287986067341029861153493029958516806302593357837933895670840754887468051140953261479000263915823241.